Apparatus for heat treating metals and alloys



Jan. 29, 1.929.v

' W. S. SMITH ET Al.

APPARATUS FOR HEAT TREATING METALS AND ALLo'Tsl origina-1 Filed 1-1 v.21,l 1925 Inventors:

w.' s. SMITH,

H. J. GARNBTT', angl J'. ,A. HOLDEN;

l By Ther'Attrneys,

come volatilized and are blown out into the atmosphere, together withlany particles of dirt. y

The invention panying drawing, With reference to the annealing of a.loaded telegraph or telephone conducto-r, but it should be understoodthat the furnace may requirements. Y f

Referring to the drawing, 1 is the furnace preferably heated byelectrical means, and ,a suitable length for which may be about 12 feet.

Y ing two gas inlets 3 and 4. The heating tube torated as at l1 so thatis provided with is prolonged to form a cooling tube Q which a Waterjacket 7. y A portion of the heat-ing tube 2 is lformed i' as a Jacket 8in Which gas inlet 3 is provided v f and to which gas is supplied by apipe 9. The

gas inlet 4 is supplied with gas through a pipe 10. m

The first portion of the heating tube is pergas may pass to the interiorof the heating tube from the jacket. In operation the A into theannealing tube from the left `hand side of the furnacel, and nitrogen ispassed through the supply pipe or pipes, the pressure of which may beadjusted as desired.

` What We claim is 1. Apparatus for heat treating metals comprising afurnace heated heating tube, and gas *inlets in the heating tube forsupplying an incombustible gas thereto located at a substantialdistance.4

is illustrated in the accombe modified to meet other `the tube,

In the furnace is-a heating tube 2 hav-` loaded conductor is led havingan externally apart from one another through piping traversing aconsiderable length of the lfurnace before connection With the heatingtube.

. each inlet means being located within the zone tube and spacedfrom theof heating of the 2. Apparatus for heat treating metals comends of saidzone,'sa1d tube between said inlet means being substantially closedsothat itcannot receive orvdischarge between said means, said inletmeans being arranged a distance apart so that. the gas supplied at oneinlet means Will flow to the atmosphere adjav cent, one end of the tubeand serve to dis-v 4pel the volatile mattei; of distillation and the gassupplied at the other inlet means Will tlow to the other lend of thetube and serve to prevent oxidation and reduction ci the article.

In testimony that We claim the foregoing as 'our invention We havesigned our Anames this fifteenth day of April, 1926. n

WILLOUGHBY STATHAM SMITH.

HENRY JOSEPH GARNETT. JOHN ANGEL HOLDEN.

